Machine for making sheet-metal pipe-elbows.



@www k y RBRUNB. MACHINE POB. MAKING SHEET METAL PIPE ELBOWS.

APPLICATION FILED IAN. 31, 1906.

Patented Dec. 17, 1912.

6 SHEETS-SHEET 1.

E. BRUNE.

MACHINE EOE MAKING sEEET METAL PIPE ELEoWs.

APPLIUATION FILED JAN. 31, 1906. 1,047,375, Patented Dec. 17, 1912.

6 SHEETS-SHEET Z.

F. BRUNE. MACHINE FOR MAKING SHEET METAL PIPE ELBOWS. APPLICATION FILED JAILaI, 1906.

1,047,375, Patented B60111912.

6 SHEETS-SHEET 3.

fm2/W @Whew- E'. BRUNE.

MACHINE PoR MAKING SHEET METAL PIPE ELBoWs.

APPLICATION FILED JAN.31, 19.06.

Patented Dec. 17, 191.2.

P. BRUNE. MACHINE EOE MAKING SHEET METAL PIPEJELBOWS.

APELIQATION FILED mmm, 190e. 1,047,375. Patented Dec.1"r',1912\fl 1 6 snEETs-sHEET 5.

@www

mV/M- P.BRUNE. MACHINE FOR MAKING SHEET ME'VIAL PIPE ELBOWS.

APPLICATION FILED IAN.31, 1908.

1,047,375. Patented'nec.1',1912. l

6 SHEETS-SHEET 6.

v Iinclined rearwardly tow-ard lits f The* head i/isprovidedilwith movable jaws or dies s, which corradially respond nrshapejvith the .corrugating' dies t ofN theystationary head s. The shanks of,

is let intoi. anannulajr recess in said head and 1s held in place therein bylsuritableNkeepers.. The ring 2 like the ring uf, has oblique slots engaging projections on thel shanks of the jaws zjand is connected o1i'opposrte"sides by links wit/li the crairk arms or vcrosshc'adA y.

As shown in Figst t and'T,"thesc'links have universal joint connections with the'cross lieatl-g-`and ring 2 to admit ofthesiifinging movement of the head ff/ lVithin ythe `opening ofthe head jz/ a clain'pmg die 3", corresponding1n 'peripheral contour with the die Y), is pivoted on a boltor' lstud 4t to the end of said die `7)v near its upper lside and asA close as possible tothe -axis-bn "which the head y swings. This die 3 is made "wedge-shaped or tapering, 'its front and rear' 'sides converging downwardly. The head 7/ is connected on thef'lower side rod 5 with a forkedlever (i, which is actuated in one direction by the'cam g land in the opposite direction 5by thecam'l h', operating through the mediumy of aroller and slide 7,y

as "show-n in Figl.` Thedi'e 3 isconnected by a` ro'd 8 'passing axially through the mandrel a and shaft c with the collar c.

A number of radially and axially movable.

bulging or crimping diesl) ha've' rearwardly extending shanks fitted in. radial and longitudinal grooves or channels in the dieer head baas shown Fiesta, 5 and G. They are held in place inP said yheadfwhi'le a liniit-ed axial movement is permitted by studs ll0 on their Shanks engaging` longitudinal slots inthe head b. The shanks of said dies 91are formed on their inner 4sidesopposite the studs 10 .with rounded bearings ll and at their rear ends with inward projections 12. They'vv are longitudinally channeled on their inner sides between-thc bearings ll and .their frdnt 'ends ror heads, which 'have .inwardly and forwardly inclined faces, fr y n The heads of thefdies 9 gradually diminish in thickness from the under toward the upper' side of the die b, to cor` espond with the space between the opposing ends of the dies b and when 'they. are separated,

showrt in Fig. 4i. The front ends of the dies.

guid'eil Iupon the rod Swand'intthe head or `iin-"axially movable head y.'13, fitt'edand die is lformed withl` longitudinal" ribs 14 "which'are beveled `at their ends tit into` the channclsinv `the 'shanke-eilt' thedies 9. Theihead 13 is-connectedwith the cellar y' bya tubulairod l5 surrounding the rod 8 insideof the mandrel 'a and shaft l`llhis collar is engaged asf'shown in.A g l, 2, by a forked lever 1G, which is actuated in 'one directioniby the cam-e and in the opposite direction by the cam f. ...The machine herein shown and described, operates follows: The parts of the ma- *chinel beingin their 'normal or initial positionsy as shown in Fig. l, a plain straight pipe section Yfrom which yan elbowy is toi be 'formed is placed on the mandrelc'and head 'or die?) through the front and rearheads g/ ands,y the Adies if and jaws .e being'drawn outward as shown in Filo TJ corrugating diest aiethen forced inwardly against'the vpipe section and inner corrugat- 'ing head or die either manually by means of the arm r, or automatically when the masfG and 7. f The 3 chine is started 'by thle arm :c on lthe rocker 'i shaft'j'); The machine beings/et in motion through the usual `or any "suitable starting and stoppingdei'fice, the pipe-section is fed forward an interval by the action of the cam cl and ratchet bar Q onthefollower ring m. 'As it is forced forward'between the head or die?) and the opposing dies tf, it is tinted or corrug-ated, the rear .ends of the dies t being j rounded or beveled outwardly 'so as tog'radually bend the sheet metal of the pipe sec.- tion without breaking or tearing it, into conformity'with thehead or die Assuming that the crank arm 'listandsv norinally when the machine at rest.' in the position in" which i s lshown in Fig. 3, when 'the machineis .set-"in motion 'the cal'n z" turning in the direction indicated by vthe arrow, turns said arm upwardly tothe left, thereby rocking the shaft y) in the proper direction to close the jaws upon the pipe section, clamping andholding it firmly againstthe die 3f The7 pipe be'iiig thus clamped and held between the inner corrugating.- die and the dies zf on the one'hand, and theinner die B'and the jaws e on'the other hand, and the piv'oted:v head 'standing inthe posit-ion in whicltit is shown in Fig. 4*, the ca-m j' acting lthrough the lever 16,"4collar and rod l5, s'the head'lS forward, thereby causing itjto carry the dies'f) fo`r\v\fard with `it and to force them outwar'dfbetween the dies b and 3, and thereby forming an'out-ward trans#V nel' verse bi'ilge or'c'rimp in 'the pipe sectiomas drawii. and lthe dies `Q a're retracted into the positions in which they areA shown in F ig. 3,

bythe action' of the cani 6. Upon theretraction of lthe dies 9 the head' ,if andthe die 3 'are.jsimultaneously -swung Abackward to? connecting rodk 8. By this noperatitmthe previously formed open bulge or crimp 1s closed and bent backward between the opposing beveled ends of the dies t and jaws le closed uponthe pipe against the die 3, and.v

by this operation fold the previously formed and backwardly bent crimp or plait against the.pipe, as/shown in Fig. 4.. The jaws arethen opened, releasing the pipe, which is fed forward another interval, and the operations for. forming and folding back another crimp or.plait in the previously corrugated part of the pipe are repeated as above eX- plained. By the successive :tormationof the transverse crimps at intervals in one side of the pipe, it is gradually bent into elbow# shape, while by its advance movement to the clamping and crimping dies, it is longitudinally lcorrugated or given any desired cross sectional shape.

It will be observed by'reference to Fig. 3,

. that vthe cam is constructed to close the jaws e twice to each revolution of t-he cam shaft o and to each advance movement of a pipe section on the mandrel a. This 1s for 4the purpose of pressing the last 'crimp or l elbows the combination of corrugating heads arranged one within the other, the outer hedd having radially movable dies, means for manually moving said .dies outward, means .for feeding a pipe section intermittentlylstep by step between said heads, means or automatically moving said dies inl,ward against th `pipe section before theilat- 'ter is advanced between the eorrugat-ing heads, means for pressing transverse bulges at intervals in one side of the pipe, and` means for closing saidbnlges and curving the pipe into elbow-shape, substantially as described.

2. In a machine for making corrugated elbows thev combination of a hollow head formed inside` with radiating longitudinal grngvgs i radially Vand longitudinally movf.;

able bulging dies tted in said grooves, a reciprocating head movable axially in said hollow head and adapted to move said dies longitudinally therein and to project and with-.

Y draw them radially and jaws or dies adapted to support a jpl e section on the outside and "on opposite si es ot the bulging dies when they are thrust outwardly, substantially as described 3. In amachine for making corrugated elbows the combination of stationary corrugating 'heads arranged one within'the other,

means for intermittently feeding a pipe secl t-ion step Vby step between said heads, radially movable bulging dies carried by the inner corrugati'ng '1ead, means for intermittently projecting said dies from said head,

`a pivoted head movable toward and from the corrugating heads and provided with radially movable jaws, a clamping die pivoted on one side to the inner corrugating head within the opening in said pivoted head, and connections for intermittently swinging said pivoted head and clamping diestoward and from the corrugating dies, substantially as described.

4. In a machine for making corrugated elbows the combinationl of corrugatingl heads arranged one within the other, the inner head having a beveled end, means for interr mittently feeding a pipe. section between said dies, awedge-shaped. clamping die cori responding in peripheral contour with the inner corrugating head and pivoted on its thicker side to said head, a pivoted head having an opening corresponding with the opening in the outer corrugating head and provided with radially 'movable jaws outside of said clamping die, connections for swinging said pivoted head and clamping die toward and vfrom the corrugating heads,

radially movable bulging dies arranged between t-he co-rrugating heads and the pivoted head and diminishin in thickness toward the axis on which said pivot head swings, and means for projecting said bulging dies outward between the inner corrugating head and the clampin die when they are separated, ysubstantia -ly as described.

5. In .a machine for making corrugated elbows the combination of amandrel terminating at its free end in a corrugating head, a stationary head surrounding said corrugating head, fand provided with radially movable dies, a lcam ring having oblique slots engaging projections on said dies and provided with an arm for turning it and movintermittently` feeding a pipe .section be-A tween ing said dies in and out, and means for feedsaid heads,`a clamping die `pivoted 011.130

. dies Isarroumling. said: eorrugating headga clamping die pivotedat one sideto theinner corrugating` head a1id.corresponding therewith in contour, a-pivotedv head movable toward and from the corrugating heads and having radially movable jaws, a' cam ring having oblique, slots engaging Ij n'ojections on said jaws, a rocker shaft having an arm connected by a link with said ringan`axi ally movable head in the inner corrugating head for projecting and retracting thel bulgv mg' dies, an -aXially movable rod passing through said head and connec. ed with said clamping die, and a cam shaft provided with cams for actuating said rocker shaft, pivoted head and jaws,.substantially as deseribedil 8.111 a machine for making corrugated elbowsv the combination with corrugating heads one arranged within the other, means .for intermittently feeding a pipe between ysaid heads,-a pivoted head movable toward and :from said corrngating heads and provided with radially movable jaws, a clamping die pivoted at one side to the inner corrugating heads, means for swinging said.

pivoted head tovardand from the corrugat ing heads once-to each advance movementot' the pipe, and means for moving said jaws in and'out twice to each advance movement ot the pipe, substantially as described.

S). In a machine for nml-:ing corrugated elbows the combination oi corrugating heads arranged-one within the other, means `for intermittently feeding a pipe between said beads, rapidly movable bulging dies carried the inner head, an axially movable head l adapted to project and retract said dies, a tubular 'shaft provided with a cam and with an axially movable collar, a rod within said shaft connecting said collar with the die op-y erating head, and a lever actuated by said camand engaging said collar, substantially as described.

10. In a machine for making @errugated elbows the lcombinationof eorrugatingheads arranged one within the other, means lfor intermittently feeding a pipe between said headsradially movable bulging dies carried by the inner head, a head movable axially in said inner corrugatin'g head and adapted to move said dies out and in, a. piyoted head n'iovable. toward and from the corrugating heads and provided with radially movable jaws, means Afor moving said jaws in and out, a clamping die pivoted atl one side to the inner corrugating head within the openl ing in said pivoted head, a tubular shaft provided with cams and axially movable collars, a tubular rod connecting the bulging die operating-head'with one of said collars, a rod passing through said die operating head and connecting the clamping die with the other collar, and levers 'actuated by said cams and engagingsaidv collars, substantially as described. y

'11. In a machine for making corrugated elbows the combination of a mandrel terminating at its free end in 'a corrugating'head, a'phead provided with radia'lly movable dies and surrounding said corrugating head, a camzring having oblique slots engaging projections on said dies, an arm for turning said ring, means for intermittently feeding a pipe on said mandrelbetween said dies and corrugating head, and a; rocker shaft having an arm adaptedto engage the arir on said earn ring and to move said dies inward before the advance movement of the pipe, substantially as described.

, In witness whereof I hereto a'liiX my signature in presence of two witnesses.

FRIE'DERICH BRUNE. Witnesses v CHAs. L. Goss, BERNARD C. RoLoFr. f 

